DCA Web TestEngine Demo

Q7 Single choice

A docker service 'web' is running with a scale factor of 1 (replicas = 1).

Bob intends to use the command 'docker service update --replicas=3 web'.

Alice intends to use the command 'docker service scale web=3'.

How do the outcomes oft these two commands differ?

A
Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.
B
Bob's command only updates the service definition, but no new replicas are started. Alice's command results in the actual scaling up of the 'web' service.
C
Bob's command updates the number of replicas of the 'web' service to 3. Alice's command results in an error.
D
Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances of the 'web' service.

DCA Web TestEngine demo